AnsweredAssumed Answered

Propeller wash does not seem accurate

Question asked by Finn Carlsvi on Dec 29, 2015
Latest reply on Dec 30, 2015 by Finn Carlsvi

Hello,

I'm trying to run a simulation of a propeller (in static condition) with duct in Solidworks 2015 Flow Simulation. The propeller diameter is 300mm and uses a clark y airfoil, it is running at 7000 rpm.

 

The problems I am having are:

  1. The propeller wash diverges, it should converge.
  2. The propeller wash dissipates almost immediately.
  3. Propeller thrust is higher in the free case than with a duct. From what I understand, theory states that edge effects would be detrimental to the thrust of the free propeller.

 

I've tried:

- Increasing the domain size

- Running the finest fidelity mesh setting

- Changing the size of the rotating domain

- Adding a small (0.1 m/s) global velocity component in Y (down in the diagram)

 

Thanks for any help you can provide, I have included a zip file with the parts and how they were setup for flow simulation.

 

/ Finn

 

Ducted propeller setup:

cut_plot_duct.PNG

data_duct.PNG

 

Non-ducted propeller setup:

cut_plot_prop.PNG

data_prop.PNG

Attachments

Outcomes